Coupling constants g$_{a_0\omega\gamma}$ and g$_{a_0\rho\gamma}$ as derived from QCD sum rules

Abstract

We consider the two point correlation function of scalar current in QCD sum rules approach to estimate the overlap amplitude of $a_0$ meson. We then employ QCD sum rules to calculate the coupling constants g$_{\omega a_0\gamma}$ and g$_{\rho a_0\gamma}$ by studying the three point ${a_0\omega\gamma}$- and ${a_0\rho\gamma}$-correlation functions.